Revealing mistake: When Josh is locking up the nuts in a silver tin, Drake asks for some nuts and Josh can't open it, It is quite clear at this point that Josh is holding the top of the tin so he can't open it.
Drake and Josh (2004)
1 revealing mistake in Number One Fan - chronological order
Starring: Drake Bell, Jonathan Goldstein, Josh Peck, Miranda Cosgrove
The Peruvian Puff Pepper - S3-E2
Other mistake: Drake and Josh find the monitor in Megan's room. After they reveal the normal wall and the family leaves, Megan hits the button behind the picture to show the monitors. However, when Drake and Josh find out that Megan entered the salsa competition, they storm into her room, but the button is still revealed in the background.
Megan Parker: Why is Josh screaming? Have the eggs hatched?
Trivia: In the episode/movie "Really Big Shrimp" it shows an external shot of The Premiere but instead of having fake movie titles it says "Now She's Carly", a reference to how Miranda Cosgrove is getting her own show on Nick, "iCarly."
Question: How does their sister Megan afford all of her equipment?
Answer: She's just sneaky that's all.
Chosen answer: Well, she is the most liked sibling, so she can probably get more out of her parents, or get money from both of them without the other knowing, or as we saw in the Gary Grills episode she can get money from people easily by telling them all sorts of stuff.